Tradition
St. Augustine
Sermons on Selected Lessons of the New Testament
Sermon 37
[LXXXVII. Ben.]
Delivered on the Lord's Day, on that which is written in the Gospel, Matthew 20:1 , “The kingdom of heaven is like a man that was a householder, who went out early in the morning to hire labourers into his vineyard.”
Source: Sermons on Selected Lessons of the New Testament (New Advent)